Question

A bag contains 63 cards (numbered 1, 2, 3, ...... , 63). two cards are picked at random from the bag (one after another and without replacement), what is the probability that the sum of numbers of both the cards drawn is even?

Answer 1

31/63×30/62,32/63, 31/62

Answer 2

Answer:15/63

Step-by-step explanation:

we know that sum of two digit is even only when both the digit are even.

from 1 to 63 there are 31 even numbers . in which we have to

select 2 numbers. so probability of sum of numbers is even,

  =

$\frac{31*30}{63*62}\\\\=\frac{15}{63}$